Pension And Other Postretirement Benefits (Schedule Of Net Periodic Pension And Postretirement Benefit Costs) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 207,309	$ 217,528	$ 636,230	$ 652,586
Interest cost	478,412	484,355	1,468,583	1,453,067
Less: Expected return on plan assets	696,173	587,362	2,128,049	1,762,088
Amortization of prior service cost	24,044	24,932	74,104	74,796
Recognized net actuarial loss	197,258	333,409	605,057	1,000,226
Net periodic expense	210,850	472,862	655,925	1,418,587
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	123,887	195,056	371,662	585,169
Interest cost	283,060	402,058	849,176	1,206,175
Less: Expected return on plan assets	0	0	0	0
Amortization of prior service cost	(599,415)	(12,688)	(1,798,246)	(38,064)
Recognized net actuarial loss	132,010	165,375	396,032	496,124
Net periodic expense	$ (60,458)	$ 749,801	$ (181,376)	$ 2,249,404